diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 44e7c4d1..ed8973d9 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,6 @@
+#Wed Jun 05 03:45:54 MDT 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-all.zip
diff --git a/src/main/java/me/goodandevil/skyblock/command/commands/island/CoopCommand.java b/src/main/java/me/goodandevil/skyblock/command/commands/island/CoopCommand.java
index bc0fa9f9..9a82ec3a 100644
--- a/src/main/java/me/goodandevil/skyblock/command/commands/island/CoopCommand.java
+++ b/src/main/java/me/goodandevil/skyblock/command/commands/island/CoopCommand.java
@@ -52,6 +52,11 @@ public class CoopCommand extends SubCommand {
 						OfflinePlayer offlinePlayer = new OfflinePlayer(args[0]);
 						targetPlayerUUID = offlinePlayer.getUniqueId();
 						targetPlayerName = offlinePlayer.getName();
+
+						if (targetPlayerUUID != null && !Bukkit.getOfflinePlayer(targetPlayerUUID).hasPlayedBefore()) {
+							targetPlayerUUID = null;
+							targetPlayerName = null;
+						}
 					} else {
 						targetPlayerUUID = targetPlayer.getUniqueId();
 						targetPlayerName = targetPlayer.getName();
diff --git a/src/main/java/me/goodandevil/skyblock/listeners/UltimateStacker.java b/src/main/java/me/goodandevil/skyblock/listeners/UltimateStacker.java
index 89148b9b..523612f9 100644
--- a/src/main/java/me/goodandevil/skyblock/listeners/UltimateStacker.java
+++ b/src/main/java/me/goodandevil/skyblock/listeners/UltimateStacker.java
@@ -49,7 +49,7 @@ public class UltimateStacker implements Listener {
                         materialAmount = level.getMaterialAmount(materials.name());
                     }
 
-                    level.setMaterialAmount(materials.name(), materialAmount + event.getAmount());
+                    level.setMaterialAmount(materials.name(), materialAmount + event.getAmount() - 1); // Normal place event still goes off
                 }
             }
         });
diff --git a/src/main/java/me/goodandevil/skyblock/menus/Coop.java b/src/main/java/me/goodandevil/skyblock/menus/Coop.java
index 8f58c0aa..df97460e 100644
--- a/src/main/java/me/goodandevil/skyblock/menus/Coop.java
+++ b/src/main/java/me/goodandevil/skyblock/menus/Coop.java
@@ -31,6 +31,7 @@ import me.goodandevil.skyblock.utils.item.nInventoryUtil.ClickEventHandler;
 import me.goodandevil.skyblock.utils.player.OfflinePlayer;
 import me.goodandevil.skyblock.utils.version.Materials;
 import me.goodandevil.skyblock.utils.version.Sounds;
+import org.bukkit.scheduler.BukkitRunnable;
 
 public class Coop {
 
@@ -164,6 +165,7 @@ public class Coop {
 			Island island = islandManager.getIsland(player);
 
 			Set<UUID> coopPlayers = island.getCoopPlayers();
+			coopPlayers.removeIf(x -> !Bukkit.getOfflinePlayer(x).hasPlayedBefore());
 
 			int playerMenuPage = playerData.getPage(), nextEndIndex = coopPlayers.size() - playerMenuPage * 36;